PixelBlock - Block email open tracking inside of Gmail

1Blocker - 1Blocker is a content blocking software that you can rely on to save time and money. Unlike its competitors who use JavaScript to block ads after they have been download, 1Blocker does the contrary. Read more about 1Blocker.

Ugly Email for FireFox - Get back your email privacy, block email tracking

Crystal - Crystal shows you the best way to communicate with any prospect, customer, or coworker based on their unique personality.

Email Privacy Protector - Check the presence of email ids on your webpages using Email Privacy Checker tool and protect yourself from email spammers.

BlockBear - Block ads and protect your privacy on iOS with a bear